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[IGSREPORT-15575] Wk 1447 IGS SINEX Combination
******************************************************************************
IGS Electronic Report 17 Oct 21:21:55 PDT 2007 Message Number 15575
******************************************************************************
Author: R. Ferland, M. Bourassa
===============================================================
Combined AC solution for GPS week 1447 - 07/09/30 to 07/10/06
===============================================================
1) Contacts:
============
e-mail: rferland @ nrcan.gc.ca
Tel: (613)995-4002 (Remi Ferland)
Fax: (613)995-3215
2) Products:
============
All products are available at:
CDDIS (cddis.gsfc.nasa.gov) and SOPAC (garner.ucsd.edu)
igs07P1447.snx Combined weekly solution.
igs07P1447.erp Daily Earth Rotation Parameters.
igs00p03.erp Daily Earth Rotation Parameters since GPS week 860.
IGS07P40.snx Cumulative Combined solution.
igs07P1447.sum This file.
igs07P1447.itr Residuals between the AC and the IGS05 for the RF stations.
igs07P1447.res Residuals between the AC and the Combined Weekly solution.
IGS07P40.res Residuals between the AC and the Cumulative Combined solution.
Where IGSyyPww & igsyyPwwww represent:
yy Last 2 digits of the year
ww week in year yy
wwww GPS week
P GPS technique used
3) Combination Strategy:
========================
The AC solutions are processed using the following procedure:
3-1) The AC solutions are checked/corrected for possible format problems,
station names inconsistencies, etc...
3-2) The AC solutions are unconstrained according to the information provided
in the SOLUTION/APRIORI Block.
3-3) The AC solutions are aligned (using a 7-parameters) and compared to the
IGS05 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS05.snx
3-4) The AC are compared to IGS05, to each other, to the previous week
solution and to the cumulative solution in order to identify and remove
outliers.
3-5) The weekly AC solutions are combined and added to the cumulative
combined solution. The cumulative combination is done to ensures 14
parameters singularity.
The weekly combined solution is aligned to the IGS05 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS05 of the reference epoch
using a 14-parameters transformation and the 132 ITRF station positions
and velocities. The IGS05 is a realization of ITRF2005.
For more details, see:
Blewitt, G., C. Boucher and J. Kouba, 1997, Procedure for ITRF continuous
realization, the report of the IGS GB, presented to the IGS Governing
Board Meeting held in San Francisco, Dec. 11.
Kouba, J., J. Ray and M.M. Watkins, IGS Reference Frame Realization, 1998
IGS Analysis Center Workshop Proceedings, European Space Operations
Centre, Darmstadt, Germany.
The combination software was developed at NRCan.
4) Remarks:
===========
ITR = IGS05.snx
igs = igs07P1447.snx
IGS = IGS07P40.snx
MIT = mit14477.snx
mit = mit1447g.snx
BuA = IERS Bulletin A
mit ncl are used to quality control the weekly combination.
gfz ngs excluded from the geocenter estimation (Sec. 5-4).
Solutions with manual station deletion:
From the original solution:
cod SATA X Y Z
emr SATA X Y Z
gfz SATA X Y Z
MIT SATA X Y Z
sio SATA X Y Z
mit SATA X Y Z
After unconstraining:
jpl TRO1
ncl YSSK
4-1) Starting with GPS week 1400, the solutions are aligned to the
IGS05.snx realization of ITRF2005.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
4-3) Starting with GPS week 1412, the accumulated ERP file has been
changed from "igs00p02.erp" to "igs00p03.erp". The main changes
are:
1) Correction of the pole position from IGb00 to IGS05 using the
transformation in:
http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html
2) Marginal ERP's in GPS week 1161 were replaced by reprocessed
values.
5) Results:
===========
5-1) AC (Variance Factor)^0.5 estimates:
==================================================
The residuals used in the estimation of the Variance Factor
are the differences between the cumulative combined solution
and each AC weekly solution.
SF = (Variance Factor)^0.5 = (Chi^2/dof)^0.5
Final(SF) = Apriori(SF) * Aposteriori(SF)
Solution |# sta| #RF | Apriori(SF)|Aposteriori(SF)| Final(SF)|
---------------|-----|-----|---------------|---------------|---------------|
cod | 170 | 93 | 22.311 | 0.997 | 22.253 |
emr | 62 | 45 | 4.875 | 0.992 | 4.835 |
esa | 64 | 48 | 14.410 | 1.000 | 14.412 |
gfz | 178 | 95 | 11.842 | 0.998 | 11.814 |
jpl | 94 | 79 | 6.650 | 1.000 | 6.650 |
MIT | 252 | 108 | 2.853 | 0.998 | 2.847 |
ngs | 199 | 107 | 34.191 | 0.998 | 34.109 |
sio | 173 | 97 | 2.651 | 0.998 | 2.646 |
mit | 304 | 104 | 2.069 | 0.998 | 2.065 |
ncl | 191 | 104 | 4.321 | 1.002 | 4.332 |
igs | 281 | 109 | 1.547 | 0.998 | 1.543 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS05 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 93 | -0.3 -0.1 -0.3 | 2.9 2.8 7.8 |
emr 45 | 0.0 0.1 0.1 | 3.2 2.7 9.2 |
esa 48 | -0.3 -0.3 -0.1 | 3.4 3.2 10.9 |
gfz 95 | -0.1 -0.1 0.0 | 2.6 2.5 7.5 |
jpl 79 | 1.3 -0.1 0.4 | 2.1 3.0 9.2 |
MIT 108 | 0.2 0.1 -0.1 | 3.4 2.5 7.9 |
ngs 107 | 0.4 0.0 -0.2 | 3.4 2.1 7.5 |
sio 97 | 0.1 -0.1 -0.3 | 2.9 2.6 7.2 |
mit 104 | -0.1 0.1 0.1 | 2.8 2.2 6.4 |
ncl 104 | 0.0 0.0 0.0 | 0.2 0.3 0.3 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 166 | -0.2 -0.1 -0.9 | 1.0 1.5 3.7 |
emr 60 | -0.4 -0.2 -0.1 | 1.5 1.9 6.1 |
esa 62 | 0.3 -0.6 0.4 | 2.1 2.3 11.4 |
gfz 175 | -0.3 -0.3 0.0 | 0.9 0.9 2.5 |
jpl 92 | 1.2 0.1 -0.6 | 1.3 2.2 6.7 |
MIT 225 | 0.2 0.0 0.1 | 1.1 0.9 2.7 |
ngs 196 | 0.2 -0.2 -0.5 | 1.9 1.7 3.2 |
sio 167 | -0.1 -0.3 -0.3 | 1.4 1.6 3.0 |
mit 274 | 0.0 -0.1 -0.1 | 0.7 0.6 1.6 |
ncl 181 | 0.0 0.0 0.1 | 3.0 2.6 6.4 |
ITR 108 | 0.0 -0.1 -0.1 | 2.9 2.1 6.5 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 162 | -0.4 0.2 -1.0 | 1.9 2.1 5.6 |
emr 60 | -0.3 0.0 -0.8 | 2.5 2.7 7.9 |
esa 61 | -0.2 -0.1 0.3 | 2.7 2.9 11.9 |
gfz 171 | -0.4 0.0 -0.4 | 1.7 1.9 6.0 |
jpl 90 | 1.1 0.6 -0.2 | 1.7 2.8 8.7 |
MIT 204 | -0.1 0.4 0.2 | 2.2 2.0 5.6 |
ngs 190 | 0.0 0.2 -0.9 | 2.6 2.1 5.0 |
sio 162 | -0.3 -0.1 -0.6 | 2.0 2.3 5.3 |
mit 246 | -0.2 0.3 -0.3 | 1.8 1.7 4.7 |
ncl 177 | -0.3 0.3 0.0 | 2.4 2.4 5.4 |
igs 248 | -0.2 0.4 -0.3 | 1.6 1.6 4.5 |
ITR 128 | -0.4 0.0 -0.2 | 1.9 1.6 6.6 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS05.snx
=========================================================
5-3-1) Estimates :
=====================
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.005 -0.001 0.003 0.4 0.1 0.8 -0.21 |
emr | 0.022 -0.041 0.044 8.4 -2.5 1.9 -0.14 |
esa | -0.001 -0.027 0.016 6.7 2.0 -8.0 -1.43 |
gfz | 0.008 -0.012 0.007 0.9 0.1 1.4 -0.55 |
jpl | 0.009 -0.006 -0.626 6.5 5.7 5.3 0.01 |
MIT | 0.021 -0.004 -0.013 9.7 -2.4 8.0 -0.12 |
ngs | 0.039 -0.039 0.005 1.8 2.2 -2.0 -1.00 |
sio | 0.021 -0.082 0.044 3.4 1.0 1.9 0.13 |
mit | 0.005 -0.006 -0.014 0.2 0.9 0.1 -0.47 |
ncl | 0.003 -0.001 -0.002 0.4 0.2 0.2 -0.16 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 -0.39 |
---------------|---------------------------------------------------------------|
5-3-2) STD :
===============
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.042 0.045 0.045 1.1 1.1 1.1 0.17 |
emr | 0.056 0.061 0.062 1.5 1.5 1.5 0.24 |
esa | 0.055 0.060 0.060 1.5 1.5 1.5 0.23 |
gfz | 0.041 0.043 0.046 1.1 1.1 1.1 0.17 |
jpl | 0.046 0.049 0.050 1.2 1.2 1.2 0.19 |
MIT | 0.039 0.042 0.043 1.1 1.0 1.0 0.16 |
ngs | 0.039 0.042 0.043 1.1 1.0 1.0 0.16 |
sio | 0.040 0.044 0.045 1.1 1.1 1.1 0.17 |
mit | 0.040 0.043 0.043 1.1 1.1 1.1 0.16 |
ncl | 0.039 0.042 0.043 1.1 1.1 1.1 0.16 |
igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.54 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | 7.4 2.0 3.3 | 2.5 2.5 3.5 |
---------------|---------------------------|---------------------------|
5-5) ERP Residuals Weighted Average & STD :
================================================
5-5-1) Weighted Average :
============================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- 0.4 --- -0.3 --- |
emr | --- 18.8 -2.3 32.8 -2.0 -21.1 |
esa | --- 2.4 2.6 --- 4.6 --- |
gfz | --- -2.5 -0.2 -1.2 1.3 4.7 |
jpl | --- --- 2.7 33.7 -1.9 9.1 |
MIT | --- -1.3 0.9 1.8 0.2 -5.2 |
ngs | --- 0.3 -2.9 3.8 -7.0 8.8 |
sio | --- -3.4 6.5 0.3 2.7 -0.4 |
mit | --- 16.6 4.5 0.2 1.2 -0.4 |
ncl | --- 28.2 -0.6 --- 3.6 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 11.9 5.3 -1.0 -1.4 3.4 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- --- 2.8 --- 0.6 --- |
emr | --- 14.7 3.6 19.2 4.2 16.9 |
esa | --- 10.0 2.1 --- 2.5 --- |
gfz | --- 11.4 3.2 6.1 2.5 5.6 |
jpl | --- --- 3.3 21.2 2.6 17.3 |
MIT | --- 6.2 2.8 6.8 2.5 14.5 |
ngs | --- 20.7 4.2 14.2 5.9 10.0 |
sio | --- 6.6 1.4 3.1 2.4 4.8 |
mit | --- 8.9 1.2 1.9 2.5 5.5 |
ncl | --- 3.4 1.7 --- 1.2 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 18.8 4.6 13.7 4.7 12.9 |
---------------|------------------------------------------------------------|
5-6) Satellite Antenna Offset Residuals weighted Average & STD :
=====================================================================
No Satellite phase center ...
5-7) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
ITRF_IGS05.snx gfz14477.snx |COCO A 3| -10.5 -0.9 -10.0|
| | |
ITRF_IGS05.snx mit1447g.snx |KUNM A 2| 5.4 -0.1 22.7|
ITRF_IGS05.snx mit1447g.snx |REYK A 3| 2.1 -2.8 -16.2|
ITRF_IGS05.snx mit1447g.snx |TIDB A 2| 5.6 6.3 12.7|
ITRF_IGS05.snx mit1447g.snx |VESL A 1| 0.5 -3.7 -20.7|
| | |
IGS07P39.snx ngs14477.snx |URUM A 1| -5.2 -11.6 19.7|
| | |
IGS07P39.snx mit1447g.snx |BAKO A 7| -0.2 4.8 -20.1|
IGS07P39.snx mit1447g.snx |URUM A 1| -5.2 -1.6 22.2|
| | |
IGS07P39.snx igs07P1447.snx |ALRT A 1| 2.6 -5.5 5.7|
IGS07P39.snx igs07P1447.snx |ISPA A 1| -0.1 9.7 10.6|
IGS07P39.snx igs07P1447.snx |URUM A 1| -4.9 -1.1 21.9|
-----------------------------------------|------------|-----------------------|
5-8) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl MIT ngs sio igs IGS
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
43401M001 BDOS A BDOS A BDOS A BDOS A BDOS A
BDOS A BDOS A
50134M001 DARR A DARW A DARW A DARW A DARW A DARW A DARW A DARW A DARW A DARW A
50134M002 DARR A
66010M001 DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
40451M123 GODE A GODE A GODE A GODE A GODE A GODE A GODE A GODE A GODE A
GODZ A GODZ A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOLD A GOLD A GOL2 A GOLD A GOLD A
GOLD A GOL2 A
22306M002 IISC A IISC B IISC A IISC A IISC A IISC B IISC A IISC A IISC A
12313M001 IRKT A IRKT A IRKT A IRKT A IRKT A IRKT A IRKM A IRKT A
43005M002 KELY B KELY B KELY B KELY A KELY B KELY A KELY A KELY A
10422M001 KIR0 A KIR0 A KR0G A KR0G A
22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
20703S001 RAMO A RAMO A RAMO A RAMO A RAMO A ELRO A ELRO A
RAMO A RAMO A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A
43001M002 THU2 A THU3 A THU3 A THU3 A THU2 A THU3 A THU2 A THU3 A THU2 A
THU3 A
43001M003 THU3 A
50107M004 YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
13407S012 MAD2 A MADR A MAD2 A MADR A MADR A MAD2 A MADR A MADR A
MADR A MADR A
13407S014 MAD2 A
50103M108 TIDB A TIDB A TIDB A TID1 A TIDB A TIDB A TID2 A TIDB A TIDB A
TID1 A TIDB A TIDB A
TID2 A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
TUCU A MIA3 A LKHU A ADKS A JCT1 A ISPA A USMX A P066 A POTR A DESC A
P473 A P472 A SAMO A CNCL A QUAR A KARA A PARK A HIL1 A XMIS A IRKM A
ADIS A VAAS A LAMP A
MISSING IERS DOMES NOS AT sio:
-----------------------------
KULU A CNCL A KARA A
MISSING IERS DOMES NOS AT igs:
-----------------------------
ADIS A HIL1 A TUCU A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ANG1 A AZCN A AZCO A KLPD A LASC A LEBA A FAAA A PALM A TELA A
IERS DOMES NO mit ncl igs IGS
============= ====== ====== ====== ======
13407S012 MAD2 A MAD2 A MADR A MADR A
MADR A MADR A
43005M002 KELY A KELY B KELY A KELY A
43401M001 BDOS A BDOS A BDOS A BDOS A
BDOS A BDOS A
43001M002 THU2 A THU2 A THU3 A THU2 A
THU3 A THU3 A
40451M123 GODE A GODE A GODE A GODE A
GODZ A
40405S031 GOLD A GOL2 A GOLD A GOLD A
GOLD A
50103M108 TIDB A TID1 A TIDB A TIDB A
TID2 A
TIDB A
50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
12313M001 IRKT A IRKT A IRKM A IRKT A
20703S001 RAMO A RAMO A ELRO A ELRO A
RAMO A RAMO A
10422M001 KIR0 A KR0G A KR0G A
MISSING IERS DOMES NOS AT mit:
-----------------------------
KULU A TUCU A MIA3 A LKHU A ADKS A JCT1 A USMX A P066 A POTR A DESC A
P473 A P472 A SAMO A CNCL A QUAR A KARA A HIL1 A IRKM A ADIS A VAAS A
MISSING IERS DOMES NOS AT igs:
-----------------------------
ADIS A HIL1 A TUCU A
MISSING IERS DOMES NOS AT IGS:
-----------------------------
ANG1 A AZCN A AZCO A KLPD A LASC A LEBA A FAAA A PALM A TELA A